Measurement of Luminous Intensity Distribution for Film and Television LED Light Sources and Its Simulation Research in Game Engines

doi:10.16182/j.issn1004731x.joss.24-FZ0772

Abstract

Abstract:

To address the issues of mismatched photometric characteristics between light sources in virtual environments and real-world lighting during film and television lighting design and lighting preview using game engines, a testing solution for measuring the luminous intensity distribution for film and television LED light sources was proposed, building upon existing luminaire light intensity distribution testing systems. Based on the obtained data, a light source calibration process was constructed in the UE5 to correctly simulate the photometric characteristics of light sources in the virtual environment. Simulation results have shown that the calibration process can accurately and efficiently reproduce the luminous intensity distribution in UE5. This study proposes an optimized solution for lighting virtual simulation in UE5, providing new theoretical and technical support for lighting matching in virtual production of film and television.

Key words: lighting simulation, game engine, film and television LED light source, luminous intensity distribution, virtual simulation

CLC Number:

TP391.9

Suo Jingyi, Lu Baihong, Qu Che. Measurement of Luminous Intensity Distribution for Film and Television LED Light Sources and Its Simulation Research in Game Engines[J]. Journal of System Simulation, 2025, 37(12): 3140-3151.

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数据来源	色温/K	最大光强/cd	光束角/(˚)	场角/(˚)
官方数据	3 200	6 032.4	103.8	158.6
官方数据	5 600	7 037.8	103.8	158.0
测试数据	3 200	6 165.4	102.2	158.4
测试数据	5 600	7 245.1	102.2	158.4

灯具	色温/K	最大光强/cd	光束角/(˚)	场角/(˚)
Dyno 650C	3 200	16 155.3	94.0	150.2
Dyno 650C	5 600	17 175.1	94.2	150.2
Evoke 900C	3 200	88 135.6	38.6	51.6
	5 600	91 413.7	38.6	51.6
	7 500	90 597.0	38.6	51.4

灯具	色温/K	标定后光强值/cd
S30-C	3 200	3 469
S30-C	5 600	2 842
Dyno 650C	3 200	9 982
Dyno 650C	5 600	11 230
Evoke 900C	3 200	101 500
	5 600	108 000
	7 500	106 500